<template>
  <div class="swiper-container" id="skuSwiper">
    <div class="swiper-wrapper">
      <div
        class="swiper-slide"
        v-for="(slide, index) in skuImageList"
        :key="slide.id"
      >
        <img
          :src="slide.imgUrl"
          @click="changeCurrent(index)"
          :class="{ active: index == currentIndex }"
        />
      </div>
    </div>
    <!-- 如果要分页器 -->
    <!-- <div class="swiper-pagination"></div> -->
    <div class="swiper-button-next" @click="changeCurrentNext"></div>
    <div class="swiper-button-prev" @click="changeCurrentPrev"></div>
  </div>
</template>

<script>
import Swiper from "swiper";
export default {
  name: "ImageList",
  data() {
    return {
      currentIndex: 0, //当前索引
    };
  },
  props: ["skuImageList"],
  watch: {
    skuImageList: {
      //服务器返回数据修改了bannerList的调用
      handler(newValue, oldValue) {
        //此时绑定时修改了数据，但是DOM还没有完全更新完，$nextTick是下一次DOM更新完再执行
        this.$nextTick(function () {
          var skuSwiper = new Swiper(".swiper-container", {
            // direction: "vertical", // 垂直切换选项
            // loop: true, // 循环模式选项
            // centeredSlides: true,

            //一行显示多少张图
            slidesPerView: 7,

            loopedSlides: 8,

            autoplay: 3000,

            slideToClickedSlide: true,

            centeredSlides: true,

            autoplayDisableOnInteraction: false,

            // 如果需要分页器
            pagination: {
              el: ".swiper-pagination",
              clickable: true,
            },

            // 如果需要前进后退按钮
            navigation: {
              nextEl: ".swiper-button-next",
              prevEl: ".swiper-button-prev",
            },
            // slides: "[]",
            grid: {
              fill: "column",
              rows: 1,
            },

            // 如果需要滚动条
            /* scrollbar: {
        el: ".swiper-scrollbar",
      }, */
          });
        });
      },
    },
  },
  methods: {
    changeCurrent(index) {
      //将点击图片的索引，给当前索引
      this.currentIndex = index;
      this.$bus.$emit("changeImg", this.currentIndex);
    },
    changeCurrentNext() {
      this.currentIndex += 1;
      this.$bus.$emit("changeImg", this.currentIndex);
    },
    changeCurrentPrev() {
      this.currentIndex -= 1;
      this.$bus.$emit("changeImg", this.currentIndex);
    },
  },
};
</script>

<style lang="less" scoped>
.swiper-container {
  height: 56px;
  width: 412px;
  box-sizing: border-box;
  padding: 0 12px;

  .swiper-slide {
    width: 56px;
    height: 56px;

    img {
      width: 100%;
      height: 100%;
      border: 1px solid #ccc;
      padding: 2px;
      width: 50px;
      height: 50px;
      display: block;

      &.active {
        border: 2px solid #f60;
        padding: 1px;
      }

      &:hover {
        border: 2px solid pink;
        padding: 1px;
      }
    }
  }

  .swiper-button-next {
    left: auto;
    right: 0;
  }

  .swiper-button-prev {
    left: 0;
    right: auto;
  }

  .swiper-button-next,
  .swiper-button-prev {
    box-sizing: border-box;
    width: 12px;
    height: 56px;
    background: rgb(235, 235, 235);
    border: 1px solid rgb(204, 204, 204);
    top: 0;
    margin-top: 0;
    &::after {
      font-size: 12px;
    }
  }
}
</style>